Consoles may actually see a reduction in these spec-intensive games. They're incredibly expensive to develop, and as a result their profit margins are razor thin. If a small indie sells half a million copies, they're rolling in dough. If a big title high graphics game sells half a million, they're deep in the red. It's higher risk to develop these "flagship" titles with next-gen graphics, and often the potential profit isn't even that great. Unless you have an established franchise with a loyal fan base (Halo, Metal Gear, etc) it's nearly impossible to get the budget approved for something like that, especially in today's market.

The thing about the PC isn't that developers aren't making enough games to take advantage of high end hardware, but there aren't enough gamers with that high end hardware to merit the massive development costs of supporting it. If you want to successfully market a PC game, one of the best things you can do is offer low system spec requirements. It won't get you a lot of exclusives for your stunning visuals, but the potential number of buyers increases dramatically.